Lcd Icons; Main Logics; Water Temperature Difference For Compressor Starting - RDZ Unica 200 Technical Installation Manual

UNICA
Sanitary water heat pump

11.3 LCD icons

1. Hot water available
The icon indicates that the domestic hot water temperature reaches the set point. The hot water is available for use. Heat
pump is standby.
2. Fan ventilation
The icon indicates that the fan ventilation function is enabled.
By pressing the button and hold it for several seconds the fan ventilation function can be enabled or disabled. If this
function is enabled the fan will continue working to ventilate the air, when the water temperature reaches the set point and
unit is standby. If this function is disabled the fan will stop, when the water temperature reaches the set point and unit is
standby.
3. Electrical heating
The icon indicates that the electrical heating function is enabled. The electrical heater will work according to the control
program. The icon flashes during a disinfection cycle.
4. Defrosting
The icon indicates that the defrosting function is enabled. This is an automatic function, the system will entry or exit the
defrosting according to the inner control program. The defrosting parameters cannot be changed at fieldwork. And the unit
does not support manual defrosting control.
5. Heating
The icon indicates that the current operation mode is heating.
6. Key lock
The icon indicates the key lock function is enabled. The keys cannot be operated until this function is disabled.
7. Left temperature display
The display shows the setting water temperature.
When checking or adjusting the parameters, this section will display the relating parameter number.
In case any malfunction occurs, this section will display the related error code.
8. Right temperature display
The display shows the current top part part temperature of the water tan.
When checking or adjusting the parameters, this section will display the related parameter value.
9. Time display
The display shows the clock time or timer time.
10. Timer 'ON'
The icon indicates that the timer 'ON' function is enabled.
11. Timer 'OFF'
The icon indicates that the timer 'OFF' function is enabled.
12. Error
The icon indicates there is malfunction.

11.4 MAIN LOGICS

11.4.1 Water temperature difference for compressor starting

Parameter 1 "water temp. difference TS6" is used to control the compressor on or off.
When down tank temperature T2 is lower than setting temperature TS1-TS6, the compressor will work to heat the water until
reaching the setting temperature TS1. On the display the top part temperature T3 of the water tank is always visualized.
24